Originally Posted by AS
SO, as stated before, range and endurance will be the relevant considerations,
- not quite as simple as that for the OP if you read post #23 - we still need to know a little more about this sim 'scenario' and we can then 'quarterback' the answers
. Regrading the rest of your post, it is not directly comparable to just "do a sector with wing tanks only, because that CoG change is all that is occurring." since there is now a fixed moment that was not there 'at planning' and now will be there at landing - whether that is significant is what this is all about, really.
The ZFW(/M) point is totally relevant and is, of course, part of the considerations in the method of trying to avoid fuel frost by retaining ctre tank fuel on landing on the NG.
you are now likely to be above the MZFW on landing
- actually you could be 'above' it at the moment of second pump failure!